Question

resolva:

A) 2x + 3 = x-1

B)x-4= 3x + 6

C) 10x - 82= 5x + 158

Answer 1

Resolução:

a)

2x + 3 = x - 1

2x - x = - 1 - 3

x = - 4

b)

x - 4 = 3x + 6

x - 3x = 6 + 4

- 2x = 10 * (-1)

2x = - 10

x = - 10 / 2

x = - 5


c)

10x - 82 = 5x + 158

10x - 5x = 158 + 82

5x = 240

x = 48